... :420nm-490nm4.Light intensity:6 intensities,maximum>6000nW/cm25.Adjustable timer:1m,5m,8m,10m,15m,30mFeatures:1.Simple,light and ... .6pcs high power LED,fan-cooled5.1-30 minutes adjustable timer,3 light intensities,suitable for more brands tooth whitening gel6 ...